The ability for a person to provide handjobs of similar quality regardless of the hand that they use.

Unfortunately Chantale broke her writing hand in a car accident. Luckily for her boyfriend Jeff, she is ambidickstrious and is able to perform handjobs of similar quality with either hand. Had Jeff been the one to have broken his writing hand, he would have had to suffer the consequences of being unable to masturbate effectively for several months.